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2. DVD region code - Wikipedia

   en.wikipedia.org/wiki/DVD_region_code

   DVD regions. DVD region codes are a digital rights management technique introduced in 1997. [1] It is designed to allow rights holders to control the international distribution of a DVD release, including its content, release date, and price, all according to the appropriate region. This is achieved by way of region-locked DVD players, which ...

3. Blu-ray - Wikipedia

   en.wikipedia.org/wiki/Blu-Ray

   Unlike DVD region codes, Blu-ray region codes are verified only by the player software, not by the optical drive's firmware. As of 2017 the latest types of Blu-ray players, suitable for Ultra HD Blu-ray content, are not region-free, but Ultra HD Blu-ray disc manufacturers have not yet locked the discs to any region and they work worldwide.

4. Regional lockout - Wikipedia

   en.wikipedia.org/wiki/Regional_lockout

   The DVD, Blu-ray Disc, and UMD media formats all support the use of region coding; DVDs use eight region codes (Region 7 is reserved for future use; Region 8 is used for "international venues", such as airplanes and cruise ships), and Blu-ray Discs use three region codes corresponding to different areas of the world. Most Blu-rays, however, are ...

5. DVD-Video - Wikipedia

   en.wikipedia.org/wiki/DVD-Video

   A normal DVD player can only play region-coded discs designated for the player's own particular region. However, a code-free or region-free DVD player is capable of playing DVDs from any of the six regions around the world. The CSS license prohibits manufacturing of DVD players that are not set to a single region by default. While the same ...

6. DVD player - Wikipedia

   en.wikipedia.org/wiki/DVD_player

   DVD player. A Sony DVP-SR370 DVD player and USB support connection. A Philips DVD player with built-in four-directional control buttons. A DVD player is a device that plays DVDs produced under both the DVD-Video and DVD-Audio technical standards, two different and incompatible standards. Some DVD players will also play audio CDs.

7. List of Compact Disc and DVD copy protection schemes

   en.wikipedia.org/wiki/List_of_Compact_Disc_and...

   DVD region code. Restricts region where media can be played by matching region number with configuration flag in DVD players. LaserLock. Includes hidden directory on the CD containing corrupted data which will cause errors while being copied. SafeDisc (version 4) See SafeDisc (versions 1-5) in previous section. SecuROM.